381597938 has 18 divisors (see below), whose sum is σ = 604940751. Its totient is φ = 180508284.

The previous prime is 381597911. The next prime is 381597959. The reversal of 381597938 is 839795183.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 190798969 + 190798969 = 13813^2 + 13813^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=13813.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 381597938.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 524531 + ... + 525257.

Almost surely, 2^381597938 is an apocalyptic number.

381597938 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

381597938 is a deficient number, since it is larger than the sum of its proper divisors (223342813).

381597938 is an frugal number, since it uses more digits than its factorization.

381597938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 748 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The square root of 381597938 is about 19534.5319370596. The cubic root of 381597938 is about 725.3294977897.

The spelling of 381597938 in words is "three hundred eighty-one million, five hundred ninety-seven thousand, nine hundred thirty-eight".